Each of the following is a patient positioning consideration for producing a quality panoramic radiograph except one. Which one is the exception?

A) The patient must be in a standing position.
B) The arches must be positioned within the focal trough.
C) The midsagittal plane must be perpendicular to the floor.
D) The patient's lips must be closed around a biteblock on a cotton roll.

A
Explanation: A) The patient may be standing or sitting, depending on the machine type.
B) The patient may be standing or sitting, depending on the machine type.
C) The patient may be standing or sitting, depending on the machine type.
D) The patient may be standing or sitting, depending on the machine type.